The recent research progress of structure- and size-controlled micro/nano-energetic materials is reviewed, which properties are fundamentally different from those of their corresponding bulk materials. The development of the construction strategies for achieving zero-dimensional (0D), one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) micro/nanostructures from energetic molecules is introduced. Also, an overview of the unique properties induced by micro/nanostructures and size effects is provided. Special emphasis is focused on the size-dependent properties that are different from those of the conventional micro-sized energetic materials, such as thermal decomposition, sensitivity, combustion and detonation, and compaction behaviors. A conclusion and our view of the future development of micro/nano-energetic materials and devices are given.
The reaction of lanthanum(Ⅲ) nitrate and 5-nitroisophthalic acid in isopropanol/H2O under hydrothermal conditions leads to a 3D lanthanum-containing coordination polymer with the general chemical formula {[La6(Nip)9(H2O)4 ]·(H2O)4 }∞(1,Nip=5-nitroisophthalate).The single-crystal X-ray analyses show that this compound crystallizes in the orthorhombic system,space group Ima2 with a=9.7769(12),b=28.239(3),c=21.149(2),V=5839.1(11)3,Z=2,Mr=2859.61,Dc =1.626 g/cm 3,F(000)=2752.14040 reflections are collected,of which 5275 are unique (R int=0.0241).Final GOOF=1.083,R=0.0406 and wR=0.1182,R indices based on 5183 reflections with I>2σ(I)(refinement on F2),443 parameters,1 restraint.Lp and absorption corrections were applied,=2.242mm-1.Absolute structure parameter x=0.08(3).The crystal structure can be described as the butterfly-liked hexanuclear lanthanum entities {La6O6(CO2)8 } covalently linked to each other by nitroisophthalate ligands into an intricate three-dimensional structure.The fluorescence spectroscopy of compound 1 has been investigated.
